# COSEC ACS vs Lamsat

The clearest difference is iOS requirement: COSEC ACS at 13.0 against Lamsat's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

COSEC ACS ships an update every 3 months, Lamsat every 2 months. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | COSEC ACS | Lamsat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 8 MB | 73 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Matrix ComSec Pvt. Ltd.](https://appshunter.io/developer/569454321) | [SCOPE TECHNOLOGIES FOR INFORMATION TECHNOLOGY](https://appshunter.io/developer/1845840233) |

## What reviewers say

### COSEC ACS

[App page](https://appshunter.io/ios/app/cosec-acs/id1484820264)

**Features:** Vision Pro support

**In-app purchases:** none


### Lamsat

[App page](https://appshunter.io/ios/app/lamsat/id6753942929)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is COSEC ACS free?

COSEC ACS is free to download, with no in-app purchases.

### Is Lamsat free?

Lamsat is free to download, with no in-app purchases.

### Do COSEC ACS or Lamsat have ads?

Neither COSEC ACS nor Lamsat shows ads.

### Which is updated more often, COSEC ACS or Lamsat?

COSEC ACS ships an update every 3 months, and Lamsat every 2 months. Most recently, COSEC ACS was updated on November 7, 2026 and Lamsat on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*